US2675486A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Beam therapy collimating unit
Assignee: Atomic Energy of Canada Ltd AECL
•
Filing: 1952-02-05
•
Granted: 1954-04-13
•
Expires: 1972-02-05
Abstract
No abstract record available.
Inventors
- 👤 Donald T Green
- 👤 Clifford S Mccolm
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 14:01
CPC Classifications
G; G21; G21K; G21K1/00; G21K1/02; G21K1/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1600867A
Cited
US1506658A
Cited
US1909118A
Cited
US2076240A
Cited
US2090270A
Cited
US2412662A
Cited
US2542196A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-04-12 | 1957-10-12 | 1958-04-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-04-12 | 1961-10-12 | 1962-04-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-04-12 | 1965-10-12 | 1966-04-13 | $7700.00 | Window Closed / Lapsed |